Multiple lens signal lantern



Nov. 24', 1931. c. o. HARRINGTON MULTIPLE LENS SIGNAL LANTERN Filed Deo, 11, v1922 llllllllI-lllllllllx llIlIIIIl-IIIIIIIH llllllllllllllllllll )Hmm-q lllllll lllllln-lllllllll Illllllillll Patented Nov. 24', 193i f oLIN'roN o. n nnnmsfror,

oF emesso,innncrsgnconsonrrro'n oF-rLLrNors .Apbiicatida me@ December In railway practice .itlijscustomaryto lenses at right anglesto each otherwith av 1*5 common source'ofligfht, theraysjivhich pass through l one `of theV lenses nloeing reflected for-y wardinithe'general direction of'those oiz the other lens, sWinging'fa-rmfs beingadaptedlito" he moved into the path or patlisof projected 20 light to eutofor' changeithe natu-re of ,the

` signal Vemanating rrn'-gthe-lensesfgrespectively. fue?. '-1 ,f. I i

It has been suggested in'railivaypractice 25 nient electrieilampsas' the'sourceolight: In

the older practice, in'vvliich thesoureeoj:',light Was: relatively large, they substantially'exact positioning of ythe source at thef i otthe lenses `variously disposed, at rghtangles "$0 to each other, was not Vessentialto airlytgood resultsf; but with' these concentratedlament lamps it Vis lsubstantially-,vital to thefprioper v illurnination of" the Vlenses that the. sen'rce` of light'tbe': at or substantially @at theirlfrespeo- "35 tivefoci. Y f

" l The i lenses 7 whichareiprovided A signal Work are offstandard. construction, "ma dein lange quantitieso ypressed -gl ass` :and

are not.ground:erotherwisesurtaeed.5 `'lheir 40 `respective focal distances fvary' a` great According'- to ordi-nary machinefrsh'opfpractice, too, the fseats' ffor ythelenses respective# ly are only approximatelylufniforrnfandffvary 1 1n Aalll measurements. lurthernioregfthe"in-.

*45 lcandizalole ilarnerit isnot attlijelsarne 'relative fjosit'ion in'ftlie larnpfivithrespectto 4thefflinfp?s? base Lor iplug" member.' 'j T lrlor- `.these principal `r.ea'so'ns'tfhe use fofthge Vio,on'eentrated filament lamp in such multiplelenslanterns "im 2dr-id notfpri'or `to my present invention, ineet In vrother 11, 1922;; serialuna..606,025,fr f

with suceess', althougli` various -eortsf' `loeeninade to o ,verfcornethe 'difficulties po1 nte d y .In lanterns yvlierein there to :be illuminated; from the source A the effect 1 of the various disparities vin len`se s,}' s e ats for saine,- and iilainentloeation is overleoine usual practice through-larnp-holcling `means i providing for adjustment of the lamp in,y verj tiQaLlateral and Vfore-anclQaft directions.:v

` The principal object ot thepresentjm provements is'toa-proyide `simple and vantageous inethoclfalid-ineansgtor utilizing nient y l-arrip in 'a lantern "having Ja4 plurality of pfrogectlonflenses, the optical a; s ofvvhieh Vare `materially. drvlergent 'and W h 'accord ing to present practical aresubstantially right .angles ftoea'ch other. The invention provides .that each ofj such Alenses zand the A cornnion small; source foi 'light :may easily "and, readilyvr he :placed in focal relation' and the desired. lgoed signal l`effects 4 thereloy, fob;

adjustment: that an .individual lens or. a plurality of (such, Alenses inay be accurately focused' withrespect .i to the .common rela-1 tivelygsmall-source otlight. 1 i @ther objects andadvantages will `appear hereinaften` j .e

' Inl the accompanying dravvn'gs," v vl1-icli forma 'partof this specifica-tion, .Figure 1 is `a top plan oa lantern Alooly havingtour provjecting lenses ninety degrees. apart, fthetop Wallloeing partially-broken .avvayand tvv/o of the t lenses vand associated partsbeing shown vin medial horizontal section; Fig. 2 isla-'side .elevationvof the lantern vof `Fig. ;l,' centain Walls -loeingpartially brokenjayta, Fig. 3 j

is afragmentary medialhorizontalseetion ofV afinodified form of the device isla fragmentary view ,showing in toplview the lamp-adjusting means illustratedby c lotted,` Vlines inQFigqQg and 'Fig.- 5 ,is ai small' side isv shownl as a rectangularcasing Whichimay beof any'approved construction, and of any]V f other approved form.V vAV projecting lens l0,

, of ordinary'construction, is secured upon the lside Wall V11 of the housing 'by means of a clampingilring 12. Three other lenses 14, 15

"andr'16', yofthe samey construction, areso ar# ranged Athat the optical axes of the adj acent onesv of the four lenses are ninety degreesV apart. At the middle portion of .the lantern is Vthe lamp 17 having the concentrated-.fila-'l Vrment 18, thelamp being mounted Ain a cylin'- j drical base member V20. The lamp supportf ing bracketv 21 Vhas a' horizontal plate-like vtop `22vrhichgh'as a relatively' large centralf V:v opening at'. 23.@- YThe lamp" base 20 extends "through thisop'ening 23"andalso-through an 1 Opening in@ Pll'flke Support 24 resting on' 'Y i* 'the 'Pla-@OUD 22. By means of the set screw 2q 25th-9.13m@ ybeSG 20 may beheldv in any desired position ofy vertical adjustment. The A plate/24 has a slotelike opening 26,.and a bind-r ing screwx27 threadedinte the bracket mem- .'25 ber 21%22 holds Vthe plate 24 in any desired?V positionA ofY fore-kand-aftl adjustmentyand since .the plate v24 may swing laterally on the Y- screw 27 as fa yipivotlthisv 'binding screw 2 7l i holds the i'lamp" fin' any j 30' lateraladjl'istment also.-

' I'have illustrated and describedV Vthis vple form ,of lamp-adjusting device merely as a. convenient Way fors'howingthat thefcon centrated filamentV 18 in Figsfl and '2` may Vr 'have been` suggested orfso adjusting lamps;`

readily 'be' 'adjustedfin vertical, lateral v'and fore-and-a'ft directions.' AVarious `devices j and for; 'an' illustratien vandrgdescription" of a highly j eliicient fdevice .for the purpose refer kencemay.belhad to myicopending applica-V vitio'n. Serial No. 454,444 'filed' March v22, 1921,

1 entitled MethodA of maintaining'V afsource V.of

tiengand common reference characters 'Willl Y f lightina'desired positionin alantern.

Each, of the lenses 14,15 and 16 is mounted "for' adjustment in vertical, 'lateral and foreand-a'ftgdirections, and since the. adj usting means'for each'lens are the same,` one descrlpf v. Y, suliice. Each Aof these adjustable' lenses is held by a metallicband 30 terminating'm'a radially-directed threaded ,member 3l/upon and a pairof'washers 34 and S5,thel screw 31pr0jectingthrou'gh arelatively large holeV 36Qinthe'top Wall ofthelantern 'body pro- Yviding for considerable' movement jotfthe Y screw', member thereinythe binding nuts be.-

i "rand-aft', directions.

to side gials'ogin fore- In the pathv O 1li i :lenses 1 4, 15@Y and .16'.arre vglass,1 3lates240, 41 ,fand`r42rirespectvely held by *clamping j* rings 1,833,160v n. i

desired positionpof -l and overlying light openings in the body Walls.V Suchglass plates not only close the respective light openingsinthe lantern body but since they may be of colored rglass the Vfied-'from' time to' time expeditious way. Y Y

In ,focusing all l p yice as 1 and,2jhavingone'relatively fixed lens as 10,' th'adj'ustment is tirstmade' Withrespecttofthe relatively fixed lens, and

the lamp to 4p'rovideefits filament .atth'e focus of the'fixed lens10, Veach ofthe-adjustable' j lenses 14, 15and 16 is adjusted infturn'to bring itsfocus at 'the ilament 18, Aand thus the desired Vfocusing of'all ofthe lenses is accomplished; 1 I .Y Y

In order that s the operator'may havefconin the lantern body a'hand hole 44 isprn'fid-V Y ed in the top VAoit thevl'antern body andthe revmovable co curel against tlie- Weather: l

Turning nOWto 3 -lenses 14, 15Jand 16 may be ofyvhite glassVV and the desiredA signals obtained and modiin asim'ple, cheap and Y.

this yis accomplished through the lamp-ad-- e. Y `vjusting.means including Vthe parts'shownin Fig. 4.y Having madethe 'adjustments of.

vvenient access tothe lamp-adjusting Vmeans as lWell vas to .the-lens-adjusting means 'With-fV `en ofithe'lenseszinsuch a der. i

ver 45 'maintains the interiorsefV tarily shown is 'in general respects like .that j shown inFigs. 1 and2and that Vtheonly.ma-

terial departurey therefrom vis in ytheJ :pro-f visien ofi relativelyy fixed lamp'support; 47 and in the factthat allof the lensesare adj ustablef A ablelinfvertical, laterali and forefand aft directions, the operator simply adjustseach zof m0" Assuming tnhiatfthesmallY filamentA @48V is notadjustableinthedeviceof I3 and that the lenses-as 49jffand 50 are -a'dju'stof light. Accordingto such construction `the lamp adjustment feature` is entirely disv pen'sedy .g with, 'simplifyingA and heapening the construction.

,rectionsl it lisapparent that-,various means could readily be suggested other than lthe one..

shownY in' Figs. 2 and 4,or instance asshoWn :mounted for fore-fandeftl 'adjustments,*the Support ,51 *being .mounted 'forvertical -edgws thereof`V and the lens support 52 being Y. Y For'adjustingthe lenses in the'desiredd-i.- L

adjustments on the` support v50, as bysl-iding i* 'up and down in guidelfmembersatthe lateral 12d mounted forlater'al adjustments onthegsup-L guide-members andasillustratedj v Y *1 "QI contemplateas' being Within` j invention y Ysuch "modifications," changes; and

' I'fclaifm:`V f 1 f Inlafsignal lantern, @thercombination' 'of theprese/ntY 1.

departures frem-:What isspecificallylherein j f port 451', Vvas byV sliding Yhorizontally in similari llustratedand describedlas are'includedin'V j" Vthe scope. of the appended@claimsjjj1 thelenses, one'atia time, to thelixedisourc'e V Y .in'ligy y5, in which the L-'shaped bracket 50i's .M5

a lantern .-body, a plurality 'of projectionk lenses carried thereby and Apositioned so as! toproject light in Various directions, one of said lenses being Within the lantern body, a

projection opening in the lantern body` oppo- `i, site said one of lsaid lenses, a substantially Y, transparent plate Vcovering said opening, a..I

small and concentrated source of light common to said lenses, and means for effecting a focused relation between said lenses respecf tively and said source, said means'includingl means associated With -said one ,of said lenses for adjusting it in vertical, lateral andore- 'rand-aft directions.' Y

2. In a signal lantern, the combination of a lanternl body, means `providing av concen-I trated source of light therein, and a Aplurality of lenses associated VWith, saidbody and arranged to project light from said source in various directions, means for adjusting said source in vertical, lateral and fore-and.aftV

directions tobring it substantially at the focus of one of said lenses, another of said lenses being mounted for adjustment in Vertical, lateral and fore-andlaft,directions to focusit With respect tothe source of light.

3. Ina signal lantern, the combination of a lantern body, a plurality of projection lenses carried thereby and positionedso asto t project light 1n various directions, a common j 1 source of concentratedlight forsaidlenses,

means for adjusting said'sourceto thefocus of one of said lenses, and means associated with the other ones ofsaid lensesrespectively for adjusting each thereof individually in Vertical, lateral and fore-andaft directions,

for the purpose specified.

CLINTON o. HARRINGTON. 

